The Abbé Provancher served a lifetime as a priest in Quebec. His interest in natural history ranged so widely as to warrent his biographer's designation of the “Linnaeus of Canada.” Retired from his church duties in 1869 to devote the rest of his life to his unfinished works in the natural sciences. He founded the periodical Naturaliste Canadien and filled its first pages with his own writings. The three letters in this collection were all dated in 1879 at his home in Cap Rouge, Quebec. The lists (1) Ichneumonoides de Quebec, species numbered 1-387, 1876 (2) Hymenoptera named by L. Provancher, and (3) Hymenoptera sent to Mr. Cresson by Provancher, 1882, are records of exchanges of museum materials with the American Entomological Society.